Circular saw



FIG. 1 is a perspective view of a circular saw showing our new design;

FIG. 2 is a right side elevational view of the circular saw of FIG. 1;

FIG. 3 is a left side elevational view of the circular saw of FIG. 1;

FIG. 4 is a front side elevational view of the circular saw of FIG. 1;

FIG. 5 is a rear side elevational view of the circular saw of FIG. 1;

FIG. 6 is a top side plan view of the circular saw of FIG. 1; and,

FIG. 7 is a bottom side plan view of the circular saw of FIG. 1.

The broken lines shown in the drawings illustrate portions of the circular saw that form no part of the claimed design. 

CLAIM The ornamental design for a circular saw, as shown and described. 